/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/AbilitySystemComponent.h
This will give the world time that all effects matching this query will be finished. If multiple effects match, it returns the one that returns last
float GetActiveEffectsEndTimeWithInstigators ( const [FGameplayEffectQuery](API\Plugins\GameplayAbilities\FGameplayEffectQuery) & Query, [TArray](API\Runtime\Core\Containers\TArray)< [AActor](API\Runtime\Engine\GameFramework\AActor) * > & Instigators ) const